what does USM Mean?? And does it make a difference??
anybody??
LovePhotography wrote: what is the difference between a regular lens and a lens with USM? I am not really even sure what it means..
anybody??
UltraSonic Motor
The main advantage of using a ring USM, is that the motor is built into the lens so that it can auto focus faster than a standard lens.
Canon's USM / UltraSonic Motors, are also famous for being quieter than standard motors used in cheaper lenses. This is useful for wildlife photographers, where animals and insects could become spooked from noisy camera parts.
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